/*
 * Copyright (C) 2022 The Dagger Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package dagger.functional.kotlinsrc.builder

import com.google.common.truth.Truth.assertThat
import dagger.Component
import dagger.Module
import dagger.Provides
import org.junit.Test
import org.junit.runner.RunWith
import org.junit.runners.JUnit4

@RunWith(JUnit4::class)
class PrivateConstructorsTest {
  // In Kotlin, object classes can't have constructors
  @Module
  internal object M1 {
    @Provides fun provideString(): String = "str"
  }

  // We suppress the warning to test the case of a "static" provides method in a module with a
  // private constructor. This is about as close as we can get since object classes can't have
  // constructors themselves.
  @SuppressWarnings("ClassShouldBeObject")
  @Module
  class M2 private constructor() {
    companion object {
      @Provides fun provideString(): Int = 13
    }
  }

  @Component(modules = [M1::class, M2::class])
  internal interface C {
    fun string(): String
    fun i(): Int

    @Component.Builder
    interface Builder {
      // M2 should not be required, even though its constructor is inaccessible
      fun build(): C
    }
  }

  @Test
  fun componentTest() {
    val component = DaggerPrivateConstructorsTest_C.builder().build()
    assertThat(component.string()).isEqualTo("str")
    assertThat(component.i()).isEqualTo(13)
  }
}
